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5SY4120-6
Siemens 5SY4120-6 available at EU Automation. Get in touch today for a quick price.
Based on over 4900 reviews
Full 12-month warranty
Available for dispatch immediately
We deliver worldwide
What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
All orders are subject to product availability. See our T&Cs.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
Siemens 5SY4120-6 (also referenced as 5SY41206) is a SENTRON 5SY4 miniature circuit breaker designed for reliable overcurrent protection in low-voltage distribution and control panels. This 1-pole device features a B tripping characteristic and a 20 A rated current, making it well suited to circuits where predictable protection against overloads and short-circuits is required. Rated for 230/400 V AC with a 50/60 Hz supply frequency range, the 5SY4120-6 offers a 10 kA short-circuit breaking capacity to EN 60898-1, with additional performance ratings in accordance with IEC 60947-2. The compact, single-module (18 mm) format mounts via a quick assembly system on standard DIN rail and supports flexible installation orientation. Combined terminals top and bottom simplify panel wiring, accommodating solid or stranded conductors from 0.75 to 35 mm² (and finely stranded with end processing up to 25 mm²), with a recommended tightening torque of 2.5 to 3.5 N·m. Built for demanding industrial environments, it is halogen-free, sealable and silicon-free, with IP20 protection (with connected conductors), energy limiting class 3, and an operating temperature range down to -40 °C and up to 70 °C.
Typical applications
- Protecting single-phase branch circuits in industrial control panels operating at 230/400 V AC
- Overload and short-circuit protection for 20 A circuits supplying machinery auxiliaries and panel power distribution
- Circuit protection for DIN-rail mounted distribution within manufacturing and process equipment enclosures
- Providing a compact 1-pole protective device where a B-curve trip characteristic suits general-purpose loads
- Safeguarding control transformers, power supplies, and panel-mounted outlets on machine electrical systems
- Use as a local isolation and protection device for individual loads within modular electrical assemblies
- Application in electrical cabinets where touch-protected, IP20-with-conductors construction is required
- Integration into installations needing supplementary add-on modules for signalling or functional extensions
- Protecting circuits in environments with wide operating temperature ranges, including unheated plant areas
- Use in mechanical engineering and industrial installations requiring consistent protection coordination across multiple protected feeders
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Find answers, guidance and resources to help you get the most out of our services.
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What our customers say
"Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times."
"Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!"
"Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!"
"Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping. "
"Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges! "
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Full 12-month warranty
ISO 9001:2015 certified
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"The prompt delivery knowing it was urgent was amazing! We are confident when EU Automation says they will try to ship as soon as possible they really mean it. Our company will definitely use them again. Service is astounding."
Courtney Zeinert
Facilities Manager
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